您好我需要小的查詢這裏是我的表SQL查詢需要幫助
user table
userid username
user001 987
user002 123
user003 456
logintrack
usrid lastlogin
user001 7/22/2009
user001 7/23/2009
user002 7/24/2009
user001 7/25/2009
user003 7/26/2009
user002 7/25/2009
user001 7/26/2990
Expected Output
userid username lastlogin
user001 987 7/26/2009
user002 123 7/25/2009
user003 456 7/26/2009
問候, 納古
您忘記發佈您遇到問題的SQL。 – 2009-07-27 10:23:15